Gymnasium-light



G. L; LOCKHARL GYMNASIUM LIGHT. APPucATm FILED JULY 24. 1919. RENEWED we. a, 1921.

PatentedSpt. 20, 1921.

UNITED STAT-ES PATENT OFFICE.

GEORGE L. LOOKHART, OF ST. PAUL, MINNESOTA, ASSIGNOR TO L. P. T. SPECIALTY COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA.

GYMNASIUM-LIGHT.

Specification of Letters Patent.

Patented Sept. 20, 1921.

Application filed July 24, 1919, Serial No. 313,131. Renewed August 3, 1921. Serial No. 489,591.

To all whom it may concern: I

Be it known that I, .G'EORGE L. LOCKHART, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and use ful Gymnasium-Light, of which the following is a specification.

in walls and especially in ceilings of are apt to damage lamps and lights protruding into the room. The object is to so place and prdtect the lights by novel means that they are safe from said dangers of getting broken.

" ceiling also in section. F1g. 3 is a perspec- ,tive view of the device detached from the ceiling and the members of it partly separated.

Referring to the drawing by reference numerals, and referring for shortness to the portion of the room as the ceiling (although the invention is applicable also to walls. and floors), 1- designates a portion of a concrete ceiling of a room used for ball playing and other athletic sports. Of said ceiling 5 designates the lath, 6 the plastering and 7 a conduit for electric wires (not shown) extending to a lamp 8,'whichmay have an X-ray reflector 9. Said lamp is mounted in the top of asheet' metal box 10, which is molded into the concrete and has its lower edge formed with an outward flange 11, to stiffen it and preserve its form.

Partly telescoped upwardly into the box 10 is a second box or frame, 12, having an external shoulder 13 stopping against the flange 11. Fixed-to said shoulder is a hollow sheet metallic molding, 14, which is provided with holes for screws, or nails, 15, which engage in wooden strips 16, which are molded into the concrete; or if the ceiling is not made of concrete they may be nailed to the regular ceiling joists.

Secured within the hollow molding 14 are nuts 17 for screws 18 to engage'in and hold stops 19 within a recess 20 of the mold .ing 14;. This invention relates to protected lightsnasiums and other rooms designed for p ay- .ing of ball games and other games which Supported upon said stops 19 is a heavy the outer flange 22 of a third frame, 23,

which resembles in form an inverted .me-

tallic tray and has a comparatively large central aperture, 24, which is covered by a glass lens 25,held. in place by fixed fingers 26. The corners of the frame 23 are 'provided with smaller apertures, 27 -for the circulation of air.

When the parts are assembledfor use, as in Fig. 2, the molding 14 aids in deflecting flying balls away from the lights as a whole; and if a ball should be so directed that it strikes within the said molding, the netting 21 will protect the lens 25; and if the netting should ever permit the ball to reach the lens, the latter will aid in protecting the lamp proper. is to give the desired color and dimness to the light, as is indicated by the circular waves 28 and radial ridges 29 'in Fig. 1..

What I claim is: I v

1. The combination with a wall, ceiling, or other part of a room, having a cavity in A further object of the lens,

its inward side, of a sheet metal box secured ting retained by the stops, a skeleton frameretained by the wire netting, and a lass lens held by the skeleton frame interme iate the netting and the lamp.

2. The structure specified in claim 1, the outer edges of the skeleton frame filling be- 55 wire netting 21; and uponsaid netting rests tween the netting and the internal shoulder that terminates the depth of the recess.

3. The structure specified in claim 1, the outer edges of the sheet metal box being formed into an outward flange fitting against the external shoulder formed by the recess in the molding.

1. The structure specified in claim 1, said means for holding the molding to the wall or ceiling comprislng a wooden strip secured in said'part ofthe room and nails or like means passed through the molding and engaged in the wooden strip.

5. The structure specified in claim 4, said ceiling being formed mainly of concrete and 15 said strips being molded into the concrete.

6. The structure specified in claim 1, said lamp and lens being disposed in the cavity beyond the face of the wall or ceiling.

In testimony whereof I aflix my signature. 20

GEORGE. L, LQCKHART 

